You can switch the lights on by putting:
this switchlight "on"
in the lights init field.
Other options are:
this switchlight "off"
this switchlight "auto"
"Auto" means the lights are switched on automatically when it gets dark........and off again when day breaks.
However, you may not like the result.
Lights placed in the Mission Editor don't work properly.
The light source appears half way up the length of the lampost.
Lights which are part of an island .wrp file work ok.
Planck